Answer:
3: x = 22.5
4: x = 3.75
Step-by-step explanation:
Answer:
6 different groups.
Step-by-step explanation:
This is the number of combinations of 2 fro m 4:
4C2 = 4! / 2! 2!
= 4 * 3 *2 *1 / (2*1*2*1
= 24/4
= 6 groups.
Answer:
$12.80
Step-by-step explanation:
Before markup: $8
After markup: $8 x 160% = $12.80
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8x + 14y = 4
-6x - 7y=-10 / *2
8x + 14y=4
-12x -14y= -20
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-4x=-16 => x=4; y= -2
Answer:
120
Step-by-step explanation:
10% of 1.2 = .12
.12 = 120